title: Novel rhenium(III, IV, and V) tetradentate N2O2 Schiff base mononuclear and dinuclear complexes.
abstract: Reaction of (Bu4N)[ReOCl4] with the tetradentate Schiff base ligand α,α'-[(1,1-dimethylethylene)dinitrilo]di-o-cresol (sal2ibnH2) yields cis-[Re(V)OCl(sal2ibn)], which quickly forms trans-[μ-O(Re(V)O(sal2ibn))2] in solution. The dinuclear complex can also be isolated by the addition of base (Et3N) to the reaction mixture. Conversely, the mononuclear complex can be trapped as cis-[Re(V)O(NCS)(sal2ibn)] by addition of (Bu4N)SCN to the reaction mixture. Reduction of cis-[Re(V)O(NCS)sal2ibn] with triphenylphosphine gives the rare trans-[Re(III)(NCS)(PPh3)(sal2ibn)] and unique μ-oxo Re(IV) dimer trans-[μ-O(Re(IV)(NCS)(sal2ibn))2]. All of the complexes were characterized by (1)H and (13)C NMR, FT-IR spectroscopy, electrospray ionization mass spectrometry (ESI-MS), cyclic voltammetry and single crystal X-ray diffraction.
authors.affiliation: Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211, USA.
authors.forename: David A
authors.initials: DA
authors.lastname: Rotsch
authors.forename: Kimberly M
authors.initials: KM
authors.lastname: Reinig
authors.forename: Eric M
authors.initials: EM
authors.lastname: Weis
authors.forename: Anna B
authors.initials: AB
authors.lastname: Taylor
authors.forename: Charles L
authors.initials: CL
authors.lastname: Barnes
authors.forename: Silvia S
authors.initials: SS
authors.lastname: Jurisson
mesh_terms: D008958:Models, Molecular; D008968:Molecular Conformation; D009589:Nitrogen Oxides / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012211:Rhenium / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D009589:Nitrogen Oxides; D009942:Organometallic Compounds; D012545:Schiff Bases; D012211:Rhenium